Bicycle seat-post lock.



TENTED FEB. 28, 1905 E. E BR BI OWN.

CYCLE SEAT POST LOCK A1PLIO ATION FILED NOV 12 iff.

no. reef/'ra Patented February 28, 1905.

laren xerrori.

elevare eeaweoer Loon,

SPECIFICATION 'forming part of Letters Patent No. 783,773, dated February 28, 1905.

Application filed November 12,1903. Serial No. 180,925.

To all 'wl/,om www cfr/accru:

Be it known that l, illimite E. BianvN, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California., have invented a new and useful Bicycle Seat-Post Lock, of which the followingl a speciiication.

This invention relates generally to bicycle seat-posts, and more particularly to an improved means for securing said post within the frame and avoiding the use of clamping bands and nuts.

Another object of the invention is to provide a instr-ming means of such character that the seat-post can be quickly and easily raised or lowered and refasteneifl without the use of a wrench or other appliance commonly used at the present time.

l/V ith these and several other objects in view the invention consists, essentially, in providing the seat-post with a series of apertures and in arranging a spring-bar upon the exterior of the upright member of the frame, said spring-bar carrying' a bolt at its Yfree end adapted to engage one of a series oi' perforations in the seat-post for the purpose of holding the said seat-post locked in the frame.

lfhe invention consists also in providing the spring-bar with a lever whereby the bolt carried by the said bar can be thrown out of engagement with the said seat-post.

The invention consists also in certain details of construction hereinafter lfully described, and pointed out in the claim.

ln the drawings 'forming part of this specilication, Figure l isa perspective view showing the practical application of my invention. Fig. Q is a sectional elevation showing the position of the parts when the said postis locked. Fig. 3 is a similar view showing' the position of the parts when the seat-post is unlocked. Figs. 4 and 5 are sectional views on the lines 4 4 and 5 5, respectively, of Fig. 2.

Referring to the drawings, A iinlicates the upright tubular member of an ordinary bicycle-frame an d in which lits the tubular seatpost B, having an arm B, to which the seat is attached. This seat-post B has a series of apertures C produced in the rear side thereof,

said apertmes being adapted to be engaged. by the bolt l), carried at the upper end of the springbar li), fastened at its lower end to the exteriorof the tubular member of the frame, a plate E being' arranged upon the interior of the tube and the bolts lili: passing' through theend of the spring-bar into said plate, thereby securely fastening the said spring-bar.

"lhe bolt I) works through an aperture F in the tubular member of the frame and is adapted to engage one oli' the series of apertures in the seat-post, thereby securely locking said seatpost within the frame, and it will of course be understood that the said seat-post will also be held against rotation, so that all clamping bands and nuts heretofore employed may be dispensed with. For the purpose of throwing the spring-bar outwardly for the purpose of disengaging the bolt from the seat# post I employ a lever (i, which is pivoted. at (ur/ in a longitudinal slot G2, produced in the spring-bar, said spring-bar being slightly reinforced at that point in order to provide a su liicient bearing for the pivot of the lever. lhis lever has a nose H, which is adapted to bear against the tubular mem ber ofthe frame for the purpose of throwing the spring-bar away from the said member, and the outer end is shaped into a suitable handle H, which normally rests close against the spring-bar, as most clearly shown in Figs. l and E2. When it is desired to adjust the seat-post, the lever is raised, withdrawing the bolt from the aperture ot' the seat-post, and the post can then be raised or lowered, as desired, and after the seat has been properly adjusted the lever is again thrown down and the bolt will engage the proper apertureaml securely lock the seatpost.

1t will thus be seen that l provide an eX- ceedingly cheap and simple device for securing the seat-post and one by means of which the said post can be quickly removed, raised,

or lowered when desired.

and a handle portion, the nose being adapted to engage the tubular upright member of the bicycle-'frame for the purpose of disengaging the looking-bolt from the seat-post, as set Having thus fully described my invention, what I clairn as new, and desire to secure by Letters Patent, is*

A seat-post having a series of apertures in 5 combination with a spring-ber secured at its forth. l lower end to the tubular upriolit member of ,y T l tlie bioyole-frmnega look-bolt rranged at the ILMER E' BRO upper end of the spring-bar and adapted to 'itnesses: l

ERNEST L. KIRKPATRICK, URIAH THOMAS.

engage the seat-post and the lever pivoted in TO a slot 1n the spring-bar and comprising a nose 

